PHYSICS AND CHEMISTRY OF MINERALS
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2025
·Vol. 52
·期 3
·1-10
·
IF 1.6
Wang Kai,Xu Jingui,Zhang Shanrong,Zhong Qifa,Zhao Wei,Fan Dawei
The equation of state of ilmenite (FeTiO 3 ) and geikielite (MgTiO 3 ) have been investigated using in situ synchrotron X-ray diffraction at high pressures up to ~ 21.8 GPa and ~ 23.0 GPa, respectively. No phase transitions were observed within the experimental pressure ranges for both samples. The pressure-volume data were fitted using the third-order Birch-Murnaghan equation of state (EoS), yielding the following results: for FeTiO 3 , the zero-pressure unit-cell volume V 0 = 312.2(1) Å 3 , the zero-pressure bulk modulus K 0 = 165(4) GPa, and its pressure derivative K ′ 0 = 6.6(6); for MgTiO 3 , V 0 = 304.17(8) Å 3 , K 0 = 157(3) GPa, and K ′ 0 = 7.3(4). Additionally, the axial compressional behavior of FeTiO 3 and MgTiO 3 were also fitted with a linearized third-order Birch-Murnaghan EoS. The axial compressibility coefficients for FeTiO 3 along the a- and c- axes are β a = 1.43(4) × 10 − 3 GPa -1 and β c = 3.17(11) × 10 − 3 GPa -1 , respectively, with an anisotropic ratio of β a : β c = 0.45: 1.00, while β a = 1.76 (7) × 10 − 3 GPa -1 and β c = 2.61(7) × 10 − 3 GPa -1 with an anisotropic ratio of β a : β c = 0.67: 1.00 for MgTiO 3 . Both FeTiO 3 and MgTiO 3 exhibit the axial compression anisotropy, of which FeTiO 3 shows stronger axial compressibility anisotropy than MgTiO 3 . Moreover, the potential influencing factors (e.g., cation radius, crystal structure, and chemical bond strength) on the bulk moduli and the anisotropic linear compressibilities of FeTiO 3 and MgTiO 3 were further discussed.
研究领域:
地球科学
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材料科学
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DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2020
·
IF 16.683
Lihan Pan,Wen Shi,Tapas Sen,Lingzhi Wang,Jinlong Zhang
The role of high-valent Fe has rarely been explored in persulfate-based heterogeneous reaction. Herein, the existence of Fe(IV) is verified in a visible light-assisted FeTiO 3 /persulfate system using methyl phenyl sulfoxide as the probe. The FeTiO 3 /persulfate/light system is capable of selectively degrading aromatic compounds with lower ionization potentials including tetracycline and bisphenol A by photo-generated high-valent Fe(IV). The contributions from SO 4 ·- , · OH and 1 O 2 are excluded. The comparable efficiency in the dark requires higher dosages and suffers from a rapid deactivation. Based on XPS, Raman and EPR analyses, the poor dark activity is caused by the formation of a complex between in situ formed Fe(III) and SO 4 2- on the FeTiO 3 surface; this complex is, however, the key intermediate for Fe(IV) production under the light irradiation. This study reveals the long-ignored role of SO 4 2- as an abundant species in iron-based persulfate systems. We also call for re-evaluating the real oxidation mechanism in other persulfate-based reactions considering the different oxidation mechanisms of radicals and high-valent iron.
研究领域:
环境科学
·
化学
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Guohua Dong,Linlin Dong,Kun Lang,Dongfeng Chai,Dongxuan Guo,Jinlong Li,Ming Zhao,Shijie Chen,Wenzhi Zhang
At present, the development of high-efficient electrocatalyst is still of great urgency for efficiently eliminating the refractory antibiotics. Herein, a novel Ti/FeTiO 3 /Ce-PbO 2 laminated electrode (TFCP) is firstly constructed via introducing FeTiO 3 interlayer into the Ti/Ce-PbO 2 (TCP). After systematical investigation on the Ti/FeTiO 3 (TF), TCP and TFCP anode with scanning electron microscope (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS) measurements, the electrocatalytic properties of these electrocatalysts have been compared by checking electrocatalytic degradation towards levofloxacin (LEVO) antibiotics coupled with systematical optimization on the electrode preparation conditions and electrocatalytic degradation process parameters. Dramatically, the optimal TFCP delivers higher removal 95% of LEVO within 120 min than those of TF (63%) and TCP (49%). Quite obviously, the introduction of FeTiO 3 interlayer is the important reason for the enhanced electrocatalytic activity of TCP, which can give rise to larger electrochemical active surface area , moderate electrochemical resistance and higher oxygen evolution potential (OEP) of TFCP than those of the TF and TCP electrodes. Also, TFCP shows predominant reusability for repeated utilization and desirable wide-applicability for other antibiotics and dyes removal . The degradation pathway has been presumably speculated by analyzing the intermediates. In conclusion, this work paves a novel avenue for the highly efficient electrocatalytic degradation towards antibiotics by introducing the interlayer into the TCP.
研究领域:
环境科学
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电化学
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材料科学
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DOI
高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
Yang Chen,Xiaohuan Wang,Xinba Yaer,Zhipeng Yuan,Guojun Ji
As a conversion-type anode material for lithium-ion batteries (LIBs), FeTiO 3 suffers from capacity fading due to the dissolution of Fe ions and the growth of solid electrolyte interphase (SEI) film. This hampers its practical application and further development in LIBs. To solve this issue, the microemulsion method (O/W) was used to encapsulate amorphous SiO 2 onto the surface of FeTiO 3 , constructing a FeTiO 3 @SiO 2 core-shell composite material. This strategy aims to alleviate the capacity loss caused by the rupture and detachment of active substances. The experimental results show that the FTO(FeTiO 3 ) electrode has a capacity of 300 mAh g −1 after 200 cycles at 100 mA g −1 , while the S 1 FTO(FeTiO 3 @SiO 2 ) electrode maintains a stable capacity of approximately 550 mAh g −1 . Furthermore, the capacity of the S 1 FTO (154.4 mAh g −1 after 500 cycles) still surpasses that of FTO (97.5 mAh g −1 after 500 cycles) at a current density of 1 A g −1 . Through ex situ XPS testing analysis of the variations under different current cycles, it is demonstrated that the SiO 2 coating has an inhibitory effect on the dissolution of Fe ions. This core-shell structure-design strategy is crucial for improving the lithium-storage performance of batteries, especially those containing conversion-type anode materials.
研究领域:
材料科学
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电化学
·
能量存储
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DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2017
·
IF 2.446
S.T. Zhang,Y.R. Ruan,C. Liu,P. Wang,Y.Q. Ma
α-Fe/FeTiO 3 /TiO 2 was synthesized through the reduction of Fe 3 O 4 @TiO 2 at 800 °C, and subsequently nitrided in NH 3 atmosphere at the nitridation temperature T N = 400, 600, 800 and 1000 °C. In the crystal lattice of TiO 2 , with increasing T N , the N element itself exhibits the chemical states of TiO 2-x N x , TiN and interstitial N, and simultaneously it induces the complex variation of the chemical state of the Ti and O elements. The photocatalytic performance of the nitrided samples is not determined only by the chemical states of the N element but by the synergistic effects of chemical states of the N, Ti and O elements.
研究领域:
材料科学
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化学
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DOI
高影响因子
Journal of Materials Chemistry C
·
2024
·
IF 5.7
Yang Chen,Ye Li,Xiaohuan Wang,Huijun Kang,Zhiming Shi,Guojun Ji,Zhipeng Yuan
Constructing heterojunctions is an effective strategy for improving the migration of electronic charge carriers and enhancing electronic conductivity. Herein, polyvinylpyrrolidone crosslinked with graphene oxide was used as a template to construct a FeTiO3@Fe2TiO5 endogenous heterojunction anode material (hetero-FTO) anode. The initial electrochemical capacity of the hetero-FTO anode (1207 mA h g−1 at 100 mA g−1) was approximately twice that of FTO (600 mA h g−1 at 100 mA g−1). Electrochemical kinetics and density functional theory calculations demonstrated that the built-in electric field formed at the interface of the endogenous heterojunction increased the electronic conductivity and effectively improved the conversion rate. The structural evolution of the heterojunction during cycling was tracked using in situ XPS and ex situ HRTEM and calculation of Gibbs free energies. After 100 cycles, the FeTiO3@Fe2TiO5 heterojunction structures transformed into cubic phase γ-Fe2O3; however, the capacity still increased to 865 mA h g−1. This ingenious heterogeneous-structure-design strategy and analysis of the heterogeneous structural evolution are crucial for improving the lithium-storage performance of batteries, especially those containing titanium-based conversion-type anode materials.
研究领域:
材料科学
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电化学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Mengyuan Liu,Jun Song,Jinlan Tang,Yuhua Zhu,Qing Shao,Yiqun Chen,Zizheng Liu,Pengchao Xie
In recent years, the exploration of sulfite (S(IV))-based advanced oxidation processes has attracted increasing attention due to its high performance in the degradation of aqueous organic contaminants. In this study, we investigated the activation of S(IV) by ilmenite (FeTiO 3 ) under photo irradiation using phenol as a substrate. The FeTiO 3 /S(IV)/photo system demonstrated a remarkable phenol removal rate, achieving 81.4 % degradation within 30 min under optimal conditions. The photocatalytic mechanism involves the generation of electron-hole pairs in FeTiO 3 , with photogenerated holes activating the adsorbed S(IV) on the catalyst’s surface to produce various free radicals, among which SO 4 − is identified as the primary active species. Density functional theory calculations further suggest that electron transfer between ilmenite and S(IV) may occur via a Fe-O-S bridge. Additionally, the approach demonstrates satisfactory reusability of the photocatalyst and consistent effectiveness in real-water matrices. This study contributes to the development of more efficient, cost-effective, and environmentally friendly water treatment strategies by providing a deeper understanding of the proposed FeTiO 3 /S(IV)/photo system.
研究领域:
环境科学
·
化学
✓ 已验证
DOI
高影响因子
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
·
2026
·
IF 3.3
Chen Buxin,Bai Chenguang,Hu Meilong,Chen Mao
Understanding the H 2 -rich reduction behavior and mechanism of the single-phase pseudobrookite (FeTiO 3 ) is essential for the green utilization of the strategic resource vanadium titanomagnetite. In this work, the reduction behavior of FeTiO 3 under CO–H 2 atmospheres was systematically investigated via non‑isothermal thermogravimetric experiments. The study focused on key parameters including the reduction degree, reduction rate, post‑reduction microstructure, and the particle size distribution of the resulting metallic iron and porosity. The results reveal that the promoting effect of H 2 -rich on macroscopic reduction behavior of FeTiO 3 originates from microstructural evolution, linking pore development and iron particle refinement.
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DOI
高影响因子
Materials
·
2022
·Vol. 15
·期 19
·6929
·
IF 3.748
Shenghao Li,Xiaohuan Wang,Zhiming Shi,Jun Wang,Guojun Ji,Xinba Yaer
Ferrous titanate (FeTiO3) has a high theoretical capacity and physical and chemical properties stability, so it is a potential lithium anode material. In this study, FeTiO3nanopowder and nanosheets were prepared by the sol–gel method and the hydrothermal method. In addition, niobium-ion doping was carried out, the radius of Nb close to Ti so the Nb can easily enter into the FeTiO3lattice. Nb can provide more free electrons to improve the electrochemical performance. Then, the effects of the morphology and niobium doping on the microstructure and electrochemical properties of FeTiO3were systematically studied. The results show that FeTiO3nanosheets have a better lithium storage performance than nanopowders because of its high specific surface area. A certain amount of niobium doping can improve the electrochemical performance of FeTiO3. Finally, a 1 mol% niobium-doping FeTiO3nanosheets (1Nb-FTO-S) electrode provided a higher specific capacity of 782.1 mAh g−1at 50 mA g−1. After 200 cycles, the specific capacity of the 1Nb-FTO-S electrode remained at 509.6 mAh g−1. It is revealed that an increased specific surface area and ion doping are effective means to change the performance of lithium, and the proposed method looks promising for the design of other inorganic oxide electrode materials.Keywords:FeTiO3;niobium doping;microstructure;lithium storage performance
研究领域:
材料科学
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电化学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yujie Zhang,Rongfang Yuan,Huilun Chen,Beihai Zhou
Combining adsorption and photocatalysis as a synergistic technique has become a research trend since adsorption is a prerequisite for photocatalytic surface reactions. In this study, a Z-scheme heterojunction FeTiO 3 @Ag/Ag 2 O with local surface plasmon resonance (LSPR) effect was fabricated for the removal of dimethoate from water. Under visible light irradiation, dimethoate could be completely removed within 75 min in the presence of 0.3 g/L FeTiO 3 @Ag/Ag 2 O (with Ag 2 O percentage of 10 wt%). High removal efficiency of dimethoate was mainly attributed to the synergistic effect between the large specific surface area of the catalyst (160.695 m 2 /g), the formation of heterojunction of FeTiO 3 and Ag 2 O, and the LSPR effect of metal Ag, which reinforced the absorption of visible light and promoted the separation and transfer of the carriers. Radicals of O 2 − and OH were the main reactive groups triggered the photocatalytic degradation process of dimethoate. Density Functional Theory (DFT) calculations indicate that P S and P–S bonds in the dimethoate molecule were more susceptible to be attacked by reactive groups. The degradation pathways mainly include oxidation of P S bond and cleavage of P–S bond, and the toxicity of most intermediates was reduced when compared with the parent compound. This study exploited the role of adsorption and photocatalysis in the field of pollutant removal, and provides ideas for the preparation of bifunctional photocatalysts.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 2
·122015
·
IF 7.5
A. Al-Farraji,Saad H. Ammar,Hanan H. Abed,Zaid H. Jabbar
Photocatalytic ozonation is an advanced oxidation process (AOP) that has recently demonstrated its strong oxidation capabilities for efficient wastewater treatment using sunlight and air as the ozone source. Additionally, the spinning disc photocatalytic reactor (SDPR) has been widely adopted recently as an intensification approach for photocatalytic processes. Herein, an efficient approach has been adopted to enhance the degradation performance of photocatalytic ozonation process over CQDs/FeTiO 3 photocatalyst film in a SDPR for synergistically enhancing the degradation of diclofenac sodium (DCF). The DCF degradations were compared in different treatment systems in the SDPR, including ozonation, catalytic-ozonation, photocatalysis, and photocatalytic ozonation. High photocatalytic ozonation performance (99.3% degradation efficiency, 85.8% mineralization, and high stability after six runs) has been acquired over CQDs/FeTiO 3 photocatalyst film under visible-light exposure. The effective separation of photogenerated charge carriers due to CQDs deposition, and high generation of ORS resulting from the combined systems were responsible for the enhanced photocatalytic performance.
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DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2026
·
IF 3.7
Wenlong Liu,Jin Dang,Yanguang Zhang,Jing Tian,Weibing Li
The limited recovery rate of powdered photocatalysts and potential secondary pollution issues have constrained the practical application of photocatalytic technology. Therefore, it is urgent to develop easily recoverable photocatalysts to address harmful algal blooms. In this study, a simple sol-gel method was used to synthesize a recyclable TiO 2 /FeTiO 3 composite photocatalyst on ceramic membrane for photocatalytic inactivation of Microcystis aeruginosa . TiO 2 /FeTiO 3 photocatalysts exhibit stable algal removal performance under various conditions (natural organic matter content, alkalinity levels et al. ), the TiO 2 /FeTiO 3 -4 photocatalyst with the best performance can achieve 100% photocatalytic inactivation of Microcystis aeruginosa (OD 680 =0.8) within 4 h of light irradiation. TiO 2 /FeTiO 3 photocatalysts can not only inactivate Microcystis aeruginosa , but also degrade intracellular and extracellular organic matter. Free radical scavenging experiments prove that holes play a major role in the photocatalytic inactivation of Microcystis aeruginosa , additionally, cyclic stability tests indicate that the photocatalyst is easy to recover and maintains a degradation rate of 97.19% even after three cycles. The process of preparing recyclable photocatalysts on ceramic membranes provides new ideas for the application of photocatalytic technology in pollutant treatment.
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高影响因子
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